[LU-5123] lprocfs_write_frac_u64_helper does not respect multiplier

Related — Thu, 27 Aug 2015 21:20:56 +0000

Working on ~~LU-4856~~, I have made use of lprocfs_write_frac_u64_helper, which turns out to not work. Specifically, the mult arg is ignored because of this logic:

units = 1;
if (units)
mult = mult < 0 ? -units : units;

This led to sanity 101a setting the 64 bit converted max_cached_mb to 32 pages (not mb) - which hung in a way that may be interesting in it's own right.

Whamcloud Community JIRA

[LU-5123] lprocfs_write_frac_u64_helper does not respect multiplier